Another common cause of low transmit power is the contact between the signal pin of the SMA connector and the PCB can be compromised if the connector is over-torqued. If the trace itself is ripped off the PCB, this is a Problem, but sometimes a blob of solder to shore up the connection will fix the issue. Try inspecting this connection under a magnifier to see if any damage is apparent.
On Thu, Jan 13, 2022 at 7:03 AM Marcus D. Leech <[email protected]> wrote: > On 2022-01-13 07:22, sp h wrote: > > For USRP x310, I had UBX 160 daughterboard, but lately, however, RX works > correctly But transmit mode is not working correctly. > I had no data signal........ > UBX 160 transmit but only there is a small carrier....? > > For HackrfOne we had the same problem, we replace RF amplifier IC, now it > works... > but for USRP can anyone guide me on which IC is probable is damaged?? > any offers? > > you can see UBX 160 schematic there... > https://files.ettus.com/schematics/ubx/ > > Thanks in advance > > _______________________________________________ > USRP-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] > > The PHA-1 (U31) is the RF output amplifier, but it sits behind two layers > of RF switch--SKY13350-385LF and HMC7992 (U50 and U32). > > I have to ask what you're doing to blow-out RF output amplifiers. > Transmitting into a dead-short for extended periods could do it, but the > power levels > of these devices are low enough that transmitting into an "open" or > other type of mis-match is unlikely to cause damage. > > > _______________________________________________ > USRP-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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